Device for reversing motion.



PATENTED FEB. 24, 19-03.

APPLICATION FILED MAR. 5, 1902.

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PATBNTED FEB. 24, 1903.

G. E. TREGURTHA. DEVIGE FOR REVBRSING MOTION.

APPLICATION FILED MAR. 5, 1908.

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- APPLICATION IILEDKAR. 5. 1902.

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UNITED STATES PATEMLQEELQL i.

GEORGE EDWARD TREGURTHA, OF MAL lulwsnunupa ilo;

' DEVICE FOR Ft EVERSING MOTION.

SPECIFICATION formingpart of Letters Patent N 0. 721,624, dated February24, 1903.

Application filed March 5, 1902. Serial No. 96,824. (No model.)

To all whom it may concern:

Be it known that I, GEORGE EDWARD TRE- GURTHA, of Malden, county ofMiddlesex, and

State of Massachusetts, have invented certain Improvements in Devicesfor Reversing Motion of Propeller -Wheels, 860., of which the followingis a full,clear,and exact description, reference being had to theaccompanying drawings, making part of this specification,

in which- 1 Figure 1 represents a side elevation; Fig. 2, a centralhorizontal section, the powershaft and the propeller-shaft being inplan; Fig. 3, a vertical transverse section on the line-w m of Figs. 1and 2 looking in the direction of the dotted arrow Fig. 4, a perspectiveview of a plate which constitutes a new member of my clutch mechanism.Figs. 5 and 6 are local transverse sections through said clutch member;Fig. 7, a detail showing a stationary clutch member having but twodiametrically opposite tapering bearings, one

only being represented; Fig. 8, a sectional detail showing the severalclutch member's enlarged and assembled together.

My present invention has particular reference to the reversing devicesofpropellerwheels set forth in United States Letters Patent No. 611,187,issued to me September 20, 1898, in which certain clutch mechanismcoacting with otherinstrumentalities was employed in applying,suspending, and changing the direction of the motion as desired. In theinvention recited in said patent a re-' volving casing surrounding agear carried by the power-shaft has a double clutch-surface at itsperiphery which was caused to alternately engage with a clutch-wheelsecured to and revolved by the power-shaft and a stationaryclutch-ringsccured to the framework. By the .said construction theseveral operations of starting,"st opping, and reversing the motion ofthe propeller-wheel were ordinarily accomplished in a satisfactorymanner; but occasionally when the reversing-lever was suddenly shifted(through inadvertence or inexperience) a lack of promptness, slightdeficiency in holding ability, or want of smoothness of motion wastemporarily experienced, which affected the ease of the occupant of theconveyance and in time caused the uneven wear of theparts in contact.

novel clutching mechanism by means of which .the movements of thepropeller or driven shaft are controlled, which I will now proceed todescribe.

In the .said drawings, A represents the frame, secured in its properposition in the boat or vehicle.

B is the driver or propeller wheel shaft, the inner end of which rotatesin a bearing 0 and its other end in a bearing. (Not shown.)

D is the driving or power shaft, located in the prolongation of the axisof the propellershaft, the contiguous ends of the two shafts beingremoved a short distance from each other and the end aof the power-shaftbeing shown as broken 0E, but intended to be driven by any suitablepower. Secured to the drivin -shaft D is a circular clutch-wheel F,having in one side a large central opening G, the

inner wall of which is tapered downward and inward to form aclutch-surface 15 16, Figs. 2 and 8, the wheel F also acting as abalancewheel. One of the prominent features of my present invention isan auxiliary clutching member consisting of a circular plate I, havingan inner rim 20 and an outer rim 21, connected by radial braces 0 andsecured by bolts at 22 to the inner side of the clutchwheel F, Figs. 2and 8. The peripheral face of the rim 21 is divided into severalsegments or sections and forms a tapering clutch-surface 23 of lessdiameter than the opening G gear-wheel K, which turns therewith and is Ipreferably located within a recess formed in the casing L and betweensuch casing and a' face-plate d, secured thereto by the bolts 26.

The plate d is fitted to the hub M of the gear K, upon which it is freeto rotate, while the casing L is mounted freely upon the hub f' of aninternal gear N, that is keyed to the driven shaft B. The larger portionof the casing L, which is disposed over the hub of this internal gear,terminates at its periphloo eryin three tapering clamping-surfaces,whichare formed integral therewith instead of being provided with a separateclutch-ring, as heretofore. The clamping-surfaces of the casing L by myimproved construction are, viz. an outer one, 76 Z, which forms aninclined annular Wall conforming to the taper of the clutch-surface 1516 of the wheel F, with which it coacts, an inner clutching-surface 1718 of less diameter than that 7r Z and with a taper corresponding withthe outer tapering surface 23 of the newly-created clutch member I, anda third clamping-surface 24 of less diameter (here) than that 17 18 andintended to conform to and coact with two inclined clamping-surfaces 2525 of a casting Z, secured to the framework, these clamping-surfaces 2525 being located diametrically opposite each other, the clutch-ring(designated S in my prior patent, No. 611,187, which was a continuousstationary ring) being dispensed with and the said clutch device havingonly two bearing-surfaces being substituted therefor.

The purpose of the divided or sectional clamping member I and thenewly-constructed casing L, with its three tapering or clutchingsurfaces, together with the stationary device Z, having two separatebearingsurfaces, is to enable the attendant to manipulate thereversing-lever T more easily and promptly and with an elasticity whichdoes not impair the tenacity of the grip of the clutching-surfaces, theresult being a reduction andmore even wear of the parts and theavoidance of unnecessary vibrations.

As the construction of the remainder of the reversing mechanism issubstantially the same as set forth in United States Patent No. 611,187and as I wish to show an operative apparatus and also the relation of mynew clutching devices thereto, I will now refer to the descriptioncontained in said patent.

P P are two diametrically opposite pinions arranged to revolve onstationary studs n, riveted to the side or plate (1 of the casing L,said pinions engaging with the'gear K and also with the internal gear N.(See Fig. 3.) Means for oiling the gearing may be provided through ahole 28 in the casing leading to another in the internal gearing, theholes being controlled by a removable plug. The reversing-lever T ispivoted at 27 to the frame A and is provided with a friction-roll V,pivoted on its inner side and located between two circular flanges W onthe propeller-wheel shaft B, by which construction when the lever isswung to the left in the direction of the dotted arrow 55 thepropeller-wheel shaft is moved in the same direction, and the casing L,with its friction or clamping surfaces, will be moved so as to disengageits clutchingsurface Z from the clamping-surface 15 16 of theclutch-wheel F and also withdraw the clutching-surface 17 18 of thecasing from the tapering surface 23 of the new clamping member 1,simultaneously with which the third clamping-surface 24 of the casingwill be brought into a position to engage with the clamping-surfaces 2525 of the stationary clutching device Z, secured to the frame, whichwill stop the casing L from rotation. Whatever be the position to whichthe friction member L of the clutch is moved by the lever T it isnecessary that engagement be maintained between the gearing thatconnects the shafts B and D, and this I secure in the form of myinvention herein illustrated by so mounting the gear K that it is freeto have a limited amount of sliding motion on the shaft D. The partsbeing in the position seen in Fig. 2, when power is applied to the shaftD the clutch-wheel F is turned, and as the casing L is frictionallyengaged by its beveled surface 70 Zwith the internal beveled surface 1516 of the clutch-wheel F and the beveled surface 17 18 of said casingalso frictionally engaged with the beveled surface 23 of the clampingmember I the easing is rotated therewith, and as the pinions P P arefree to revolve on their studs riveted to the casing the pi nions willbe carried around with the latter without revolving on their studs, butcause the internal gear N to rotate with the casin g, which being keyedto the propeller-wheel shaft B will be revolved in common with saidshaft in the same time and (H rection and carry the boat, &c., forward.To reverse the direction of the boat, move the handle of the lever T tothe left, which moves the propeller-shaft in its bearings and also theinternal gear secured to said shaft, and as the casing incloses theinternal gear they are both moved in the same direction sufliciently towithdraw the clutching-surfaces of the casing from those of theclutch-wheel F and new clutch member I and enable the thirdclutching-surface of the casing to engage with the twoclutching-surfaces 25 25 of the stationary clutch Z, secured to theframe, which prevents the revolution of the casing. The central gear Kis now carried around with the power-shaft D, which revolves theintermediate pinions P P, which in turn drive the internal gear N in theopposite direction to the rotation of the power-shaft, and as theinternal gear is secured to the propeller-wheel shaft the latter iscaused to revolve in the opposite direction to the power-shaft, thusreversing the motion of the boat without changing the direction of thepower.

To stop the rotation of the propeller-wheel in either direction andwithout changing the motion of the driving-shaft, it is only necessarytooperate the shifting-lever so as to bring the casing L into suchposition that its clamping-surfaces 70, l, 17, 1S, and 2 1 willseverally be withdrawn from contact with the clamping-surfaces 15 16 ofthe clutch-wheel F, the beveled surface 23 of the clutch member I, andalso the two beveled surfaces 25 25 of the stationary clutch Z; but asthe casing in this released position will revolve with the powershaftand carry around therewith bodily the pinions P P they will have noinfluence on the internal gear to move the propeller-wheel shaft, andconsequently the boat will be stationary, although the power-shaft maybe in motion. I I

Although the clutching-plate I furnishes additional frictional surface,it may be omitted or may be used without being divided into segments,and the newly-constructed casing formed integral with one of its sidesand having but two peripheral clutching-surfaces It Z and 24, coactingwith the tapering surfaces 15 16 of the balance clutch-wheel and thesurfaces 25 25 of the newly-constructed stationary clutching device Z,may be employed with more satisfactoryresults than when the casing asheretofore constructed was used with the continuous clutching-surface ofa stationary clutching device; but I prefer the employment of asectional auxiliary clutchplate I with the newly-constructed casinghaving three clutchingsurfaces and the newly-constructed stationaryclutch with two clamping-surfaces, as thereby I obtain the best possibleresults, as herein previously recited.

I claim- 1-. In combination, adriving-shaft, a driven shaft, a clutchmember carried by the drivingshaft having two oppositely-inclinedfrictionsurfaces one internal and the other external, a sliding clutchmember having two clutchfaces arranged to engage respectively with thetwo clutch-faces of the clutch member carried by the driving-shafflandplanetary gearing arranged between the two shafts, the revolving'pinionsof which are carried by the sliding clutch member, substantially as setforth. 7

2. In combination, a driving-shaft and a driven shaft, a clutch-wheelsecured to the driving-shaft, an auxiliary clutch member se-' cured tothe clutch-wheel, acasing adapted to revolve with and slidelongitudinally relative to the driving-shaft and having threeclutching-surfaces; two of which surfaces are arranged to engagerespectively with the clutch-surface of the clutch-wheel and that of itsattached clutching member, a stationary clutch device secured to theframework and with which stationary clutch the third clutching-surfaceof the casing'engages, a gear on the driving-shaft, a gear secured tothe driving-shaft, one or more intermediate pinions pivoted to saidcasing, and adapted to engage with the driving-shaft gear and thedriven-shaft gear, and mechanism for moving the clutch-endowed casing inopposite directions, substantially as set forth.

3. In combination, a driving-shaft and a driven shaft, a clutch-wheelsecured to the driving-shaft, a sectional auxiliary clutch membersecured to the clutch-wheel, a casing adapted to revolve and slidelongitudinally upon the driving-shaft and having threeclutching-surfaces, two of which are arranged to engage respectivelywith the clutch-surface of the clutch-wheel and the clutch-surface ofits attached sectional member, a stationary clutch device formed withtwo clamping-surfaces and secured to the framework,

and with which stationary clutch, the third clutching-surface of thecasing engages, a gear adapted to revolve and slide longitudinaily uponthe power-shafuand inclosed by said casing, a gear secured to the drivenshaft, one or more intermediate gears pivoted driving-shaft and havingthree clutching-surfaces, two of which are arranged to engagerespectively with the clutch-surface of the balance clutch-wheel and theclutch-surfaces of its attached sectional member, a stationary clutchdevice formed with two diametric ally opposite clamping-surfaces andsecured to the framework, and with which stationary clutch, the thirdclutching-surface of the casing engages,'a gear adapted to revolve andslide longitudinally onthe power-shaft and inclosed 'by said casing, aninternal gear N carried by the driven shaft, one or more intermediategears-pivoted to said casing and adapted to engage with thedriving-shaft gear and the driven-shaft gear, and mechanismfor movingthe clutch-acting casing backward and forward upon the driving-shaft,constructed and arranged to operate substantially as specified.

In testimony whereof I have hereunto set my hand in the presence oftwosubscribing witnesses.

GEORGE EDWARD TREGURTIIA.

Witnesses:

N. W. STEARNS, WM. TREGURTHA.

